New Motorbike module added to VeSyMA suite

VeSyMA, the Vehicle Systems Modelling and Analysis suite from Claytex, has a new addition in 2020: VeSyMA – Motorbike!

Overview:

VeSyMA – Motorbike was introduced to satisfy the multi domain simulation needs of the motorcycle industry. The current capabilities range from energy consumption to driveability and performance analysis and cover all powertrain possibilities including ICE, hybrid and electric.

We have maintained a template based philosophy that allows a “plug-and-play” approach to vehicle building and testing. A new rider model has been introduced that allows open loop throttle and braking whilst maintaining the closed loop control for the gearshifting.

Figure 1. Diagram layer of a motorbike experiment.
Figure 1. Diagram layer of a motorbike experiment.

Applications:

In addition to road motorbikes, VeSyMA – Motorbike also covers motorsports applications and includes experiments that are capable of playing back into the motorbike measured data from track testing and races which allow the by-pass of the complicated controller logic and yield extremely fast simulations.

Pseudo double-strut front suspension using lumped spring-dampers and equivalent rear spring and damper rates also contribute to the simulation speed enhancements and therefore make the models suitable for parameter sweeps and parameter optimisation.

Electrification

Although we already include ECM battery models within the Motorbike library, the existing models can also be coupled to the Battery library to enable more detailed modelling of cooling path strategies, cell to cell thermal and electrical interaction, cell ageing using either the built-in models or by plugging in alternative ones.

Figure 2. Electric motorbike diagram layer offering the plug-and-play approach to building and testing.
Figure 2. Electric motorbike diagram layer offering the plug-and-play approach to building and testing.
Figure 3. Diagram layer of a battery pack within the Battery library.
Figure 3. Diagram layer of a battery pack within the Battery library. Thermal models represent the 3d thermal interactions from cell-to-cell and module-to-module within the pack.
Figure 4. The battery library also allows you to go to the full detail of an electrochemical cell model to characterise higher level models for BMS use.
Figure 4. The battery library also allows you to go to the full detail of an electrochemical cell model to characterise higher level models for BMS use.
Figure 5. More detailed electric motors and controllers available within the bolt-on Electrified Powertrains library.
Figure 5. More detailed electric motors and controllers available within the bolt-on Electrified Powertrains library.

ICEs

The Motorbike library can make use of table based Internal Combustion Engines or bring in more detailed multibody mean value and crank angle resolved engine models from VeSyMA – Engines for more advanced analysis. These models will also include the full airpaths of the ICE and predictive combustion models.

Thermal Management

Thermal management components within the Motorbike library offer an intuitive and interactive functionality and are well suited for existing system representation and new system design.

Figure 6. Thermal management example diagram with dynamic visualisation of model states
Figure 6. Thermal management example diagram with dynamic visualisation of model states.

Suspension testing

All of our libraries include test models that allow any subsystem and assembly to be tested in isolation. Suspension systems can therefore be rig tested for kinematics and compliance where multi-body forces can be applied to the hub frame that come from test data or custom profiles.

More detailed FEA derived compliance can be achieved with the add on module FlexBody.

Figure 7a. Rear suspension test rig where the hub load data can be played back through the time table
Figure 7a. Rear suspension test rig where the hub load data can be played back through the time table
Figure 7b. Built-in visualisation for the rear suspension. CAD files can also be attached for more realistic rendering as per the vehicle body.
Figure 7b. Built-in visualisation for the rear suspension. CAD files can also be attached for more realistic rendering as per the vehicle body.

Duty cycle and Drive cycle tests

The user can plug in any drive cycle they wish, whether it is an existing one, such as the NEDC cycle, or a custom built one. These can range from public road speed-time traces to proving ground and race track traces to analyse how different powertrain configurations can benefit the motorbike and driving characteristics.

Figure 8. Drive cycle simulation including motorbike built-in animation (top left), Diagram layer of experiment model (bottom left), a selection of plots (right).
Figure 8. Drive cycle simulation including motorbike built-in animation (top left), Diagram layer of experiment model (bottom left), a selection of plots (right). All of these have been generated through built-in scripts that can be customised.

Licenceless model export

All models can be exported as executables, FMUs and s-functions that are then able to be distributed and run without a Dymola licence.

FMI: Functional Mock-up Interface

We also offer a service that precompiles the models and delivers them as one of the above. Initial values and parameter values can still be edited by the user and the models run from Matlab Simulink and other environments of your choice, including a standalone executable in Windows and Linux.

As a Motorbike designer, here are the reasons why you should be interested in VeSyMA – Motorbike:

  • Fully capable of representing the multi-physical nature of the motorbike without the need for co-simulation:
    • Multibody inc. FEA based compliances
    • Rotational
    • Transnational
    • Hydraulic
    • Thermofluid
    • Electrical
    • Electronic and more.
  • Open models
  • Exportable models
  • Built-in visualisation

Please get in touch for more information.

Written by: Alessandro Picarelli, Engineering Director

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